Heap buffer overflow in `CCtx::try_clone` on a multithreaded context

CCtx::tryclone experimental feature, deprecated copies tables sized from the context's applied parameters. Starting a multithreaded frame zstdmt feature replaces those parameters with the workers' without resizing the context's own tables, so after an abandoned single-threaded frame, the copy wro...

PT-2026-125061

CCtx::try clone experimental feature, deprecated copies tables sized from the context's applied parameters. Starting a multithreaded frame zstdmt feature replaces those parameters with the workers' without resizing the context's own tables, so after an abandoned single-threaded frame, the copy...

PT-2026-125065

When a multithreaded frame zstdmt feature, CParameter::NbWorkers is left unfinished, its jobs may still be running on the worker threads: the C library only waits for them when the next frame starts, or when the context is freed. A session reset makes the context accept changes again in the...